Inspired by youtube videos, I decided to design my own. The main enclosure will take 18 hours printed at 3200mm/minute, each side should be about 2 hours. While you can buy shelf speakers that sound decent, this thing will be louder and kick way more bass. I bought mid-range 3-inch speakers from here: https://www.parts-express.com/grs-3fr-4-full-range-3-speaker-driver-4-ohm--292-436#lblProductDetails

I'm driving it with one of these amps: https://www.walmart.com/ip/200W-Mini-Hi-Fi-Amplifier-Amp-Radio-MP3-Stereo-Audio-12V-US-AC-Adapter/745601052?wmlspartner=wlpa&selectedSellerId=7698

You will need brass inserts and screws for the speaker mounting and closing up the sides: https://www.mcmaster.com/94459a290 https://www.mcmaster.com/90272a148

Here's video of it in action: https://youtu.be/waviRdexpMg